I got two new specialty cards in November--neither one from PADI, BTW. Both were from PSAI, the agency represented in this thread by Trace Malin, who posted above. I took both of them because I wanted the training. Cards came with both of them. In one case, I really didn't care whether I got the card or not. In the other, I very much needed the card.
The first was for sidemount diving in an overhead environment. I could have taken the open water sidemount diving course from the same instructor and learned much of the same stuff, but since I was planning to do most of my sidemount diving in an overhead environment, that's what I chose. I got very good instruction, and I got a card. The card is sitting in a box in a cupboard and will probably never see the light of day again, but who cares? The instruction was valuable, and I got what I paid for.
The other card, from the same instructor, was for operating a dive propulsion vehicle (scooter) in an overhead environment. The only difference between the card I received for that class and the card I received for the sidemount class is that I have already needed to show it. When I dived the Devil's Eye system in Florida last month, I had to show the card each day to be allowed to use my scooter in the cave.
Can someone tell me what is wrong with what I did in either of these cases?